Debt Obligations (Commercial Paper) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Short-term Debt [Line Items]
Short-term Debt	$ 1,098	$ 1,517
Commercial paper
Short-term Debt [Line Items]
Short-term Debt	$ 0	$ 420

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant